from time import sleep

from selenium import webdriver

driver=webdriver.Firefox()
driver.get('https://www.baidu.com/')

driver.find_element_by_link_text('新闻').click()
sleep(2)

hds=driver.window_handles

driver.switch_to.window(hds[1])

sleep(2)
driver.find_element_by_link_text('军事').click()

driver.find_element_by_partial_link_text('进驻高原').click()

sleep(2)
hds=driver.window_handles
driver.switch_to.window(hds[2])

driver.close()
driver.switch_to.window(hds[1])

driver.close()
driver.switch_to.window(hds[0])

sleep(2)
driver.find_element_by_id('kw').send_keys('selenium')

driver.find_element_by_id('su').click()

sleep(2)
driver.quit()